Abstract

A new belondirid, dorylaimid taxon, Oleaxonchium olearumgen. et sp. nov., collected from an olive grove in the Andalusia region of Spain, is characterised, including its morphological description, morphometrics, SEM study, and molecular (18S-, 28S-rDNA) analyses. The new genus displays a unique combination of traits that distinguishes it from its closest genera: a rectangular lip region with sclerotized margins when observed in lateral view and visibly hexagonal in face view under SEM; a comparatively long cheilostom with thickened walls at its anterior part; a short isthmus-like section separating both pharyngeal regions; a mono-opistho-ovarian didelphic female genital system without pars refringens vaginae; and a short and rounded tail. The new species is characterised by its 2.44–2.87 mm long body, lip region 7–7.5 µm wide, odontostyle 10–10.5 µm long, neck 723–973 µm long, pharyngeal expansion occupying 63–72% of the total neck length, female anterior genital branch 4–6% of body length, tripartite posterior uterus 1.9–2.6 body diameters long, with a short intermediate section bearing sclerotized elements, vulva (V = 58–61) a transverse slit, caudal region 29–35 µm long (c = 74–89, c’ = 0.9–1.1), and male unknown. As derived from an integrative approach combining morphological and molecular data, the new genus is close to Metaxonchium, the polyphyly of Belondiridae is confirmed, and support is provided in favour of the monophyly of Axonchiinae.

Addeddate

2024-08-28 15:17:33

Bhl_virtual_titleid

165999

Bhl_virtual_volume

v.100:no.3 (2024)

Call number

10_3897_zse_100_128096

Call-number

10_3897_zse_100_128096

Foldoutcount

0

Genre

article

Identifier

oleaxonchiumole100pena

Identifier-ark

ark:/13960/s2m01rf71nc

Identifier-bib

10_3897_zse_100_128096

Identifier-doi

10.3897/zse.100.128096

Issue

3

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

1.0000

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

69

Page_number_module_version

1.0.5

Page_range

1029-1039

Pages

11

Pdf_degraded

invalid-jp2-headers

Pdf_module_version

0.0.25

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

Zoosystematics and Evolution 100(3)

Year

2024

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